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What is the pH of a solution that is 0.01 M in hydrochloric acid (HCl)?

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Question: What is the pH of a solution that is 0.01 M in hydrochloric acid (HCl)?

Options:

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Correct Answer: 2

Solution: 

The pH of a 0.01 M HCl solution is 2, as HCl is a strong acid and fully dissociates in solution.

What is the pH of a solution that is 0.01 M in hydrochloric acid (HCl)?

Practice Questions

Q1
What is the pH of a solution that is 0.01 M in hydrochloric acid (HCl)?
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Questions & Step-by-Step Solutions

What is the pH of a solution that is 0.01 M in hydrochloric acid (HCl)?
Correct Answer: 2
  • Step 1: Understand that hydrochloric acid (HCl) is a strong acid, which means it completely breaks apart in water.
  • Step 2: When HCl dissolves in water, it releases hydrogen ions (H+) into the solution. For every mole of HCl, one mole of H+ is produced.
  • Step 3: Since the solution is 0.01 M in HCl, it means there are 0.01 moles of HCl in one liter of solution.
  • Step 4: Because HCl fully dissociates, the concentration of H+ ions in the solution is also 0.01 M.
  • Step 5: Use the formula for pH, which is pH = -log[H+]. Here, [H+] is the concentration of hydrogen ions.
  • Step 6: Calculate the pH: pH = -log(0.01). This equals 2.
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